Remove unused imports in test modules.
diff --git a/Lib/test/test_fileio.py b/Lib/test/test_fileio.py
index cdc3123..5589d05 100644
--- a/Lib/test/test_fileio.py
+++ b/Lib/test/test_fileio.py
@@ -10,8 +10,7 @@
from weakref import proxy
from functools import wraps
-from test.test_support import (TESTFN, findfile, check_warnings, run_unittest,
- make_bad_fd)
+from test.test_support import TESTFN, check_warnings, run_unittest, make_bad_fd
from test.test_support import py3k_bytes as bytes
from _io import FileIO as _FileIO